Dozens of lo­cal, state and fed­eral agen­cies will pa­trol Bos­ton at this week­end’s fes­tiv­i­ties af­ter DHS agreed to give the event a “SEAR 1” rat­ing, Pa­trick McMur­ray, Mas­sachusetts’ un­der­sec­re­tary for home­land se­cu­rity, told The Bos­ton Globe.

State and city of­fi­cials dis­cussed their prepa­ra­tions at a Wed­nes­day af­ter­noon press con­fer­ence and told the es­ti­mated 3 mil­lion in­di­vid­u­als plan­ning on at­tend­ing the Ren­dez-Vous 2017 Tall Ships Re­gatta and Sail Bos­ton Fes­ti­val this week­end to ex­pect height­ened se­cu­rity mea­sures, in­clud­ing the use of heavy ma­chin­ery ve­hi­cles to block re­stricted ar­eas.

Bos­ton Po­lice Com­mis­sioner Bill Evans ac­knowl­edged that author­i­ties aren’t aware of any spe­cific threats in­volv­ing this week­end’s event but are act­ing out of an abun­dance of cau­tion.

“I know a lot of peo­ple are wor­ried about the SEAR 1 rat­ing, but that was done months ago, and is more about the com­plex­ity of the event,” he said Wed­nes­day, also re­fer­ring to the in­ter­na­tional na­ture of the event. Ships and dig­ni­taries from 20 na­tions are ex­pected to par­tic­i­pate in this week­end’s event.